Not really sure why they are called water pump pliers, but I find them extremely useful. I carry the Knipex 8701150 6-Inch Cobra Pliers in a pouch on my belt. I posted a review of it on Amazon along with some images.

There's a guy on the crew that has some vise grips with a round thing welded on the end to grab the tabs on the hose clamps. I think he said he got it from a local appliance parts house. They work really well.

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LowSL215+ Years of Professional Appliance Repair ExperienceFormer $ears/a$e tech